Second harmonic generation

{
  "id": "MLC-T-CHM-010606",
  "term": "Second harmonic generation",
  "field": "Chemistry",
  "definition": "A nonlinear optical phenomenon where two photons of identical frequency interact with a material, resulting in the creation of a new photon with twice the energy and frequency of the initial photons. This process requires a non-centrosymmetric medium for efficient conversion. It finds application in frequency doubling lasers and in microscopy for imaging biological tissues without staining.",
  "synonyms": [
    "frequency doubling"
  ],
  "subject": "Polymer",
  "references": [
    "PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 46 (https://doi.org/10.1515/pac-2020-0501)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/second-harmonic-generation/"
}